CallCredit Noddle are terrible too.
Call Credit refused to remove erroneous data from my Credit Report depsite me having provided them with all the evidence they had asked for. It was only when I contacted the Financial Ombudsman and they got involved that it got cleared up. I then was paid compensation by CallCredit themsleves, and also Cabot Financial who also refused to stop chasing me for someone else's debt. Simialr situation with Liverpool Victoria, however they repsonded very quickly when I pointed out their error, and offered me £250 as an apology.